MICROBIAL CORROSION

reportActive / Technical Report | Accession Number: AD0670501 | Open PDF

Abstract:

Studies of the effect of microorganisms, particularly sulfate reducers Desulfovibrio, on marine corrosion were initiated. The inability of sulfate reducers to grow on the agar surface of media appears to be due to the presence of the ferrous salt used as an indicator for hydrogen sulfide. Evidence indicates that phosphate may be an electron acceptor in the cathodic depolarization of steel. Iron phosphide and vivianite were produced by Desulfovibrio growing in contact with mild steel. The organism reduces phosphate in the presence of hydrogen to form a volatile phosphorous containing compound which is not phosphine. Light increases the corrosion rate of steel as indicated by polarization measurements. The cathodic protection currents required to maintain a potential of 0.8 volts on a steel specimen in indirect sunlight was found to be 1.5 times that required in the dark.

Author(s):
Iverson, Warren P.
Author Organization(s):
NATIONAL BUREAU OF STANDARDS GAITHERSBURG MD
Descriptive Note:
Technical summary rept. no. 1, 1 May 1967-30 Apr 1968
Pagination:
0049

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release
Distribution Statement:
Approved For Public Release; Distribution Is Unlimited.

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
NBS-9846
Contract/Grant Number(s):
NAONR-14-67
Project Number(s):
NBS-3120442, NR-036-072
Monitor Series:
ONR
 Subject Terms
Joint Capability Areas:
JCA_4.3_Maintain; JCA_5.3_Planning; JCA_5_Command and Control
Communities of Interest:
No COI(s) Identified
Descriptor(s):
*CORROSION INHIBITION, *MICROORGANISMS, CORROSION, BACTERIA, STEEL, CIRCUITS, SULFATES, SPIRILLACEAE, NITRATES, NITRITES, CULTURE MEDIA, PHOSPHATES, OXIDATION REDUCTION REACTIONS, SEA WATER, CATHODIC PROTECTION, IRON, BIBLIOGRAPHIES, LIGHT
Field(s)/Group(s):
Microbiology, Marine Engineering
Keyword(s):
ANAEROBIC BACTERIA, GRAPHS(CHARTS)
Report Date:
1968 Apr 30